Well i know this seems weird...but actually PBY Catalina ever active on regular commercial airline service especially after WWII.
Even Garuda Indonesia ever used it until 1950's before it's being replaced by DH Heron (well this A/C also not yet in database with it's 2 engined sister, DH Dove). Up to 14-28 pax can be carried by PBY Catalina. Maybe this should be considered to be added in database as pre-R** world aircraft like DC-3 etc..
Specifications : http://pbycatalina.com/specifications/
Anyway, here's a picture of Garuda Indonesia PBY Catalina
Thank You!